| 起爆时差对孔间裂缝贯穿影响的动光弹研究 |
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| 引用本文： | 朱振海,杨永琦.起爆时差对孔间裂缝贯穿影响的动光弹研究[J].爆炸与冲击,1991,11(4):346-352. |
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| 作者姓名： | 朱振海 杨永琦 |
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| 作者单位： | 南京工程兵工程学院，南京工程兵工程学院，中国矿业大学北京研究生部，南京市公安局消防处 南京 210007，南京 210007，北京，南京 |
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| 摘 要： | 文章用动光弹试验方法研究了相邻两个炮孔被同时起爆和采用不同的起爆时差起爆时炮孔之间应力波的传播及其应力波对裂纹扩展的影响,并重点研究了炮孔之间裂纹的产生、扩展及贯穿过程和机理。研究结果表明:在先起爆的炮孔爆炸产生的动态应力场存在时起爆另一个炮孔,即起爆时差N基本满足t/c(?)Nt/c(?),是在后起爆的炮孔孔壁上产生主导控制裂纹的最有利条件;在先起爆的炮孔旁钻导向孔,并采用合适的起爆时差可以获得炮孔间的最佳贯穿。
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| 关 键 词： | 延时起爆 炮孔 裂纹贯穿 动光弹 |
DYNAMIC PHOTOELASTIC STUDIES IN THE INFLUENCE OF DELAY IGNITION ON THE PENETRATION OF CRACKS BETWEEN BOREHOLES |
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| Zhu Zhenhai,Qu Guangjian,Yang Yongqi,bhang Jian.DYNAMIC PHOTOELASTIC STUDIES IN THE INFLUENCE OF DELAY IGNITION ON THE PENETRATION OF CRACKS BETWEEN BOREHOLES[J].Explosion and Shock Waves,1991,11(4):346-352. |
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| Authors: | Zhu Zhenhai Qu Guangjian Yang Yongqi bhang Jian |
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| Abstract: | The propagation of the stress waves and the influence of the waves on the extension of cracks between two adjacent boreholes initiated simultaneously or deiayedly were investigated with the method of dynamic photoelasticity. The analysed results expressed that the delay-initiation borehole was initiated during the present of the dynamic stress fields generated by the explosion of the former-initiation borehole is the favourable condition of generating guiding cracks on the wall of the delayed borehole. The optimum form of the penetration between boreholes may be realized by means of drilling a guiding-hole near the former-initiation borehole with an available delay time. |
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| Keywords: | delayed ignition borehole penetration of cracks dynamic photoelasticity |
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